@Test
public void estimation() throws Exception {
ItemsSketch<String> sketch = new ItemsSketch<String>(8);
sketch.update("1", 1000);
sketch.update("2", 500);
sketch.update("3", 200);
sketch.update("4", 100);
sketch.update("5", 50);
sketch.update("6", 20);
sketch.update("7", 10);
sketch.update("8", 5);
sketch.update("9", 2);
sketch.update("10");
Tuple inputTuple =
PigUtil.objectsToTuple(new DataByteArray(sketch.toByteArray(new ArrayOfStringsSerDe())));
EvalFunc<DataBag> func1 = new FrequentStringsSketchToEstimates("NO_FALSE_POSITIVES");
DataBag bag1 = func1.exec(inputTuple);
Assert.assertNotNull(bag1);
Assert.assertTrue(bag1.size() < 10);
EvalFunc<DataBag> func2 = new FrequentStringsSketchToEstimates("NO_FALSE_NEGATIVES");
DataBag bag2 = func2.exec(inputTuple);
Assert.assertNotNull(bag2);
Assert.assertTrue(bag2.size() < 10);
Assert.assertTrue(bag1.size() < bag2.size());
}
@Test
public void exact() throws Exception {
EvalFunc<DataBag> func = new FrequentStringsSketchToEstimates();
ItemsSketch<String> sketch = new ItemsSketch<String>(8);
sketch.update("a");
sketch.update("a");
sketch.update("b");
Tuple inputTuple =
PigUtil.objectsToTuple(new DataByteArray(sketch.toByteArray(new ArrayOfStringsSerDe())));
DataBag bag = func.exec(inputTuple);
Assert.assertNotNull(bag);
Assert.assertEquals(bag.size(), 2);
Iterator<Tuple> it = bag.iterator();
Tuple tuple1 = it.next();
Assert.assertEquals(tuple1.size(), 4);
Assert.assertEquals((String) tuple1.get(0), "a");
Assert.assertEquals((long) tuple1.get(1), 2L);
Assert.assertEquals((long) tuple1.get(2), 2L);
Assert.assertEquals((long) tuple1.get(3), 2L);
Tuple tuple2 = it.next();
Assert.assertEquals(tuple2.size(), 4);
Assert.assertEquals((String) tuple2.get(0), "b");
Assert.assertEquals((long) tuple2.get(1), 1L);
Assert.assertEquals((long) tuple2.get(2), 1L);
Assert.assertEquals((long) tuple2.get(3), 1L);
}
@Test
public void emptySketch() throws Exception {
EvalFunc<Double> func = new GetQuantileFromDoublesSketch();
DoublesSketch sketch = DoublesSketch.builder().build();
Double result =
func.exec(
tupleFactory.newTuple(Arrays.asList(new DataByteArray(sketch.toByteArray()), 0.0)));
Assert.assertEquals(result, Double.POSITIVE_INFINITY);
}
@Test
public void emptySketch() throws Exception {
EvalFunc<DataBag> func = new FrequentStringsSketchToEstimates();
ItemsSketch<String> sketch = new ItemsSketch<String>(8);
Tuple inputTuple =
PigUtil.objectsToTuple(new DataByteArray(sketch.toByteArray(new ArrayOfStringsSerDe())));
DataBag bag = func.exec(inputTuple);
Assert.assertNotNull(bag);
Assert.assertEquals(bag.size(), 0);
}
@Test
public void normalCase() throws Exception {
EvalFunc<Double> func = new GetQuantileFromDoublesSketch();
DoublesSketch sketch = DoublesSketch.builder().build();
sketch.update(1.0);
Double result =
func.exec(
tupleFactory.newTuple(Arrays.asList(new DataByteArray(sketch.toByteArray()), 0.5)));
Assert.assertEquals(result, 1.0);
}
@Test
public void testNullEmpty() throws IOException {
EvalFunc<String> func = new SketchToString("false");
Tuple dataTuple = null;
String result = func.exec(dataTuple);
assertNull(result);
dataTuple = TupleFactory.getInstance().newTuple(0);
result = func.exec(dataTuple);
assertNull(result);
}
@Test
public void testExactWithDetail() throws IOException {
EvalFunc<String> func = new SketchToString("true");
Tuple dataTuple = TupleFactory.getInstance().newTuple(1);
dataTuple.set(0, createDbaFromQssRange(64, 0, 64));
String result = func.exec(dataTuple);
assertNotNull(result);
assertTrue(result.contains("SUMMARY"));
assertTrue(result.contains("SKETCH DATA DETAIL"));
}
@Test
public void testExactNoDetailWithSeed() throws IOException {
EvalFunc<String> func = new SketchToString("false", Long.toString(DEFAULT_UPDATE_SEED));
Tuple dataTuple = TupleFactory.getInstance().newTuple(1);
dataTuple.set(0, createDbaFromQssRange(64, 0, 64));
String result = func.exec(dataTuple);
assertNotNull(result);
assertTrue(result.contains("SUMMARY"));
assertFalse(result.contains("SKETCH DATA DETAIL"));
}
@Test
public void schema() throws Exception {
EvalFunc<DataBag> func = new FrequentStringsSketchToEstimates();
Schema schema = func.outputSchema(null);
Assert.assertNotNull(schema);
Assert.assertEquals(schema.size(), 1);
Assert.assertEquals(schema.getField(0).type, DataType.BAG);
Assert.assertEquals(schema.getField(0).schema.size(), 1);
Assert.assertEquals(schema.getField(0).schema.getField(0).type, DataType.TUPLE);
Assert.assertEquals(schema.getField(0).schema.getField(0).schema.size(), 4);
Assert.assertEquals(
schema.getField(0).schema.getField(0).schema.getField(0).type, DataType.CHARARRAY);
Assert.assertEquals(
schema.getField(0).schema.getField(0).schema.getField(1).type, DataType.LONG);
Assert.assertEquals(
schema.getField(0).schema.getField(0).schema.getField(2).type, DataType.LONG);
Assert.assertEquals(
schema.getField(0).schema.getField(0).schema.getField(3).type, DataType.LONG);
}
protected static Tuple accumulate(Tuple input, EvalFunc evalFunc)
throws ExecException, NumberFormatException {
DataBag values = (DataBag) input.get(0);
int numberOfTheColumns = values.iterator().next().size();
Tuple tupTmp = createInitTuple(input);
long progressCounter = 0;
for (Iterator<Tuple> it = values.iterator(); it.hasNext(); ) {
Tuple t = it.next();
if ((++progressCounter % 1000) == 0) {
progressCounter = 0;
evalFunc.progress();
}
if (isTupleMarked(t)) {
// removeTheMarker(t);
} else {
t = buildInitialTupleForTheRow(t);
}
mergeResultsIntoAggregation(tupTmp, t);
}
markTheTuple(tupTmp);
return tupTmp;
}
@Test
public void emptyInput() throws Exception {
EvalFunc<DataBag> func = new FrequentStringsSketchToEstimates();
DataBag bag = func.exec(TupleFactory.getInstance().newTuple());
Assert.assertNull(bag);
}
@Test
public void nullInput() throws Exception {
EvalFunc<DataBag> func = new FrequentStringsSketchToEstimates();
DataBag bag = func.exec(null);
Assert.assertNull(bag);
}
@SuppressWarnings("null")
@Test
public void outputSchemaTest() throws IOException {
EvalFunc<String> udf = new SketchToString();
Schema inputSchema = null;
Schema.FieldSchema inputFieldSchema = new Schema.FieldSchema("Sketch", DataType.BYTEARRAY);
Schema nullOutputSchema = null;
Schema outputSchema = null;
Schema.FieldSchema outputOuterFs0 = null;
Schema outputInnerSchema = null;
Schema.FieldSchema outputInnerFs0 = null;
inputSchema = new Schema(inputFieldSchema);
nullOutputSchema = udf.outputSchema(null);
outputSchema = udf.outputSchema(inputSchema);
outputOuterFs0 = outputSchema.getField(0);
outputInnerSchema = outputOuterFs0.schema;
outputInnerFs0 = outputInnerSchema.getField(0);
Assert.assertNull(nullOutputSchema, "Should be null");
Assert.assertNotNull(outputOuterFs0, "outputSchema.getField(0) schema may not be null");
String expected = "tuple";
String result = DataType.findTypeName(outputOuterFs0.type);
Assert.assertEquals(result, expected);
expected = "chararray";
Assert.assertNotNull(outputInnerFs0, "innerSchema.getField(0) schema may not be null");
result = DataType.findTypeName(outputInnerFs0.type);
Assert.assertEquals(result, expected);
// print schemas
// @formatter:off
StringBuilder sb = new StringBuilder();
sb.append("input schema: ")
.append(inputSchema)
.append(LS)
.append("output schema: ")
.append(outputSchema)
.append(LS)
.append("outputOuterFs: ")
.append(outputOuterFs0)
.append(", type: ")
.append(DataType.findTypeName(outputOuterFs0.type))
.append(LS)
.append("outputInnerSchema: ")
.append(outputInnerSchema)
.append(LS)
.append("outputInnerFs0: ")
.append(outputInnerFs0)
.append(", type: ")
.append(DataType.findTypeName(outputInnerFs0.type))
.append(LS);
println(sb.toString());
// @formatter:on
// end print schemas
}
@Test(expectedExceptions = IllegalArgumentException.class)
public void wrongTypeForFraction() throws Exception {
EvalFunc<Double> func = new GetQuantileFromDoublesSketch();
DoublesSketch sketch = DoublesSketch.builder().build();
func.exec(tupleFactory.newTuple(Arrays.asList(new DataByteArray(sketch.toByteArray()), 1)));
}
@Test(expectedExceptions = IllegalArgumentException.class)
public void wrongTypeForSketch() throws Exception {
EvalFunc<Double> func = new GetQuantileFromDoublesSketch();
func.exec(tupleFactory.newTuple(Arrays.asList(1.0, 1.0)));
}
@Test(expectedExceptions = IllegalArgumentException.class)
public void wrongNumberOfInputs() throws Exception {
EvalFunc<Double> func = new GetQuantileFromDoublesSketch();
func.exec(tupleFactory.newTuple(1));
}
